Add 20/21 and 27/49
20/21 + 27/49 is 221/147.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 49 is 147
Next, find the equivalent fraction of both fractional numbers with denominator 147 - For the 1st fraction, since 21 × 7 = 147,
20/21 = 20 × 7/21 × 7 = 140/147 - Likewise, for the 2nd fraction, since 49 × 3 = 147,
27/49 = 27 × 3/49 × 3 = 81/147 - Add the two like fractions:
140/147 + 81/147 = 140 + 81/147 = 221/147 - So, 20/21 + 27/49 = 221/147
In mixed form: 174/147
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/21+27/49 20/21+54/49 20/42+27/49 20/21+27/98 60/21+27/49 20/21+81/49 20/63+27/49